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libnetlink: add attribute access inline functions 

Based on idea in libmnl, add attribute access functions instead
of explicitly exposing casts. Also handle possible alignment issues
of u64.
This commit is contained in:
Stephen Hemminger 2011-12-29 09:29:33 -08:00
parent cd70f3f522
commit 46c5d64d69
1 changed files with 19 additions and 0 deletions
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19
include/libnetlink.h
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@ -70,6 +70,25 @@ extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rta
({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
__parse_rtattr_nested_compat(tb, max, rta, len); })
static inline __u16 rta_getattr_u16(const struct rtattr *rta)
{
return *(__u16 *)RTA_DATA(rta);
}
static inline __u16 rta_getattr_u32(const struct rtattr *rta)
{
return *(__u32 *)RTA_DATA(rta);
}
static inline __u64 rta_getattr_u64(const struct rtattr *rta)
{
__u64 tmp;
memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
return tmp;
}
static inline const char *rta_getattr_str(const struct rtattr *rta)
{
return RTA_DATA(rta);
}
extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler,
void *jarg);
extern int rtnl_from_file(FILE *, rtnl_filter_t handler,